PersistableClass.create
(
    // class name(s)
    "SimpleClass", "SimpleClasses",
    
    // class definition
    function()
    {
        this.identifiedBy("id");
        
        this.hasField("dataValue", { lengthConstraint: 100 });
    },
    
    // class body
    {
        initialize: function(dataValue)
        {
            this.dataValue = dataValue;
        }
    }
);